Invalid chair



FIG. 1 is a perspective view looking down from a point located at the right side, and forward of, the invalid chair;

FIG. 2 is a front view thereof, looking down;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view, looking slightly down, from the left side thereof; and,

FIG. 5 is a side view from the right side thereof. 

The ornamental design for an invalid chair, as shown and described. 